Omega Centauri
Omega Centauri, also known as NGC 5139, is the largest and brightest globular cluster in the Milky Way, containing about 10 million stars. It is located approximately 15,800 light-years away in the constellation Centaurus.
Source: noirlab.edu
APODs including "Omega Centauri"
Globular Star Cluster 47 Tuc
16/01/2011
Globular star cluster 47 Tucanae is a jewel of the southern sky. Also known as NGC 104, it roams the halo of our Milky Way Galaxy along with some 200 other globular star clusters. The second brightest globular cluster (after Omega Centauri) as seen from planet Earth, it lies about 13,000 light-years away and can be spotted naked-eye near the Small Magellanic Cloud in the constellation of the Toucan. The dense cluster is made up of several million stars in a volume only about 120 light-years across. Red giant stars on the outskirts of the cluster are easy to pick out as yellowish stars in this sharp telescopic portrait. Globular cluster 47 Tuc is also home to exotic x-ray binary star systems.